GB/T 19421.2-2003
Test methods of crystalline layered sodium disilicate—Measurement of whiteness
KS M ISO 1690-2017(2022)
Sodium and potassium silicates for industrial use — Determination of silica content — Gravimetric method by insolubilization
KS M ISO 1690-2017
Sodium and potassium silicates for industrial use — Determination of silica content — Gravimetric method by insolubilization
EN ISO 21587-1:2007